Talk to Dermatologist on Diagnosed As Eczema

I was using talcum powder like black beauty in my armpits to avoid sweat and smell since ma childhood, 2 years ago, i got allergic to it then that allergy kept increasing, i am not able to apply any deodorant and antiperspirant, and it itches, it's dry and there are rashes and patches.. doctor gave me advanton milk 0.1% but it didn't work. Now i don't even feel clean right after shower.. body odour increase even half an hour, it seems like the germs doesn't ho away, i tried cleaning that area with detol but didn't work. Please any solution.